Erosion studies of cermet-coated ASTM A36 steel
Industrial Lubrication and Tribology
ISSN: 0036-8792
Article publication date: 19 December 2018
Issue publication date: 5 March 2019
Abstract
Purpose
This paper aims to perform the solid particle erosion studies in simulated coal-fired boiler conditions with a view to compare the erosion behavior of two different types of detonation gun (D-Gun) sprayed cermet coating powders, that is, WC-12%Co and Cr3C2-25%NiCr on ASTM A36 steel and bare (uncoated) ASTM A36 steel.
Design/methodology/approach
Erosion studies were performed using an air jet erosion test rig at impingement angles of 45°, 60° and 90°. During the erosion studies weight loss, erosion rates in terms of volume loss (mm3/g) and measurement of erosion profiles were determined using optical profilometer.
Findings
Both cermet coatings had successfully protected the ASTM A36 steel from erosion at impingement angles of 45°, 60° and 90°. In the case of bare ASTM A36 steel, the erosion rates were maximal at an impingement angle of 45° and minimal at an impingement angle of 90°, thus depicting the peculiar erosion behavior of ductile materials. WC-12%Co coated specimens exhibited erosion behavior that is closer to the behavior of ductile materials. Cr3C2-25%NiCr coated specimens exhibited the maximum erosion rate at an impingement angle of 90° and minimum at an impingement angle of 45°, hence depicting the typical behavior of brittle materials.
Practical implications
It is expected that these results will contribute to the improvement of erosion resistance of induced draft fans, by the application of D-Gun sprayed WC-12%Co and Cr3C2-25%NiCr cermet coatings.
Originality/value
This paper evaluates the solid particle erosion behavior of bare and cermet-coated ASTM A36 steel which will be helpful in choosing the suitable cermet coating for induced draft fan applications.
Keywords
Acknowledgements
The authors wish to thank the Pressure and Process Boilers, Saharanpur, India, for providing the base material; SVX Powder M Surface Engineering Pvt. Ltd., Greater Noida-201306, India, for providing the facility of the D-Gun thermal spray coating; Ducom Instruments Pvt. Ltd., Bangalore, India, for providing an air jet erosion test rig for the conduct of erosion studies; IIT, Roorkee, India, for providing the facility of SEM/EDS and XRD analysis during this investigation. The authors are extremely grateful to the officials, staff and supervisor appointed by the IKG Punjab Technical University, Kapurthala, for their guidance and support. The authors would like to thank the referees of Industrial Lubrication and Tribology for their valuable suggestions and comments for modifying the contents of this paper.
Citation
Shibe, V. and Chawla, V. (2019), "Erosion studies of cermet-coated ASTM A36 steel", Industrial Lubrication and Tribology, Vol. 71 No. 2, pp. 242-252. https://doi.org/10.1108/ILT-01-2018-0001
Publisher
:Emerald Publishing Limited
Copyright © 2018, Emerald Publishing Limited